The Chester Valley Railroad was finished in 1853. It extended the entire 4 mile width of Upper Merion from east to west, with stations at Maple, King of Prussia, Henderson, and Shainline. It began at Bridgeport and connected with the PA Railroad at Downingtown. There were at least seven short branches erected by private enterprise, leading from mines and quarries toward the Schuylkill, two of which were over a mile in length.
(Source: Upper Merion Township The First 300 Years, pg. 60)
E-History Fact published 3/20/2015 Upper Merion Township E-Newsletter